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Articoli di riviste sul tema "Sealing (Technology)"

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Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 3 marzo 2023

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1

Zhang, Fu Ying, Xi Mei Lu, Ping Wang e Qing Ping He. "Efficiency-Reinforcement Design of Hydraulic Reciprocating Sealing Element Driven by TRIZ Technology Evolution". Materials Science Forum 628-629 (agosto 2009): 97–102. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.97.

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Abstract (sommario):
The efficiency reinforcement technologies of sealing is important for improving sealing’s reliability and effectivity which result in zero leakage. Technology evolution of TRIZ can be used to forecast the future technology in products. These future technologies can guide a designer along the right direction of developing a new product. In this paper, the efficiency-reinforcement principle of hydrodynamic reciprocating sealing is discussed, technology evolution of TRIZ is integrated with the efficiency reinforcement design of hydrodynamic reciprocating sealing element to predict its future structure state. A new cross section shape of reciprocating sealing element corresponding to the predicted structure state is presented. The computational model of the new reciprocating seal element is established with ANSYS, and its stress, strain and pressure distribution are also analyzed. The results demonstrated that the presented seal elemente outperforms the old O-ring seal in efficiency reinforcement capacity.
2

Lucas, Rebecca, e Trevor Taylor. "Sealing Technology Transfer Leaks". RUSI Journal 166, n. 1 (2 gennaio 2021): 32–47. http://dx.doi.org/10.1080/03071847.2021.1896954.

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3

Houquan, Zhou, e Ma Qianqian. "Research on “Three Sealing and One Grouting” Sealing Technology". IOP Conference Series: Earth and Environmental Science 332 (5 novembre 2019): 032042. http://dx.doi.org/10.1088/1755-1315/332/3/032042.

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4

Ye, Qing, Zhen Zhen Jia, Yan Pi e Hai Zhen Wang. "Analysis on Sealing Method and Sealing Materials of Gas Drainage Borehole". Advanced Materials Research 716 (luglio 2013): 485–89. http://dx.doi.org/10.4028/www.scientific.net/amr.716.485.

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Abstract (sommario):
With the increase of gas drainage volume and gas drainage requirement of coal seam in China, more and more attention to gas drainage effect of coal seam is paid. The gas flow law and borehole sealing mechanism are briefly described, the borehole sealing technologies of different materials are analyzed and the requirements are obtained as follows: 1Sealing materials shall have permeability. 2Sealing materials shall have expansion. 3The strength and hardness of sealing material can not be too high. 4Sealing materials are compact; sealing materials shall have certain strength. 5Sealing materials can be obtained easily and their price shall be low. 6Sealing process is simple and is constructed easily. Finally, the high polymer foam sealing technology, the mechanical elastic sealing technology, borehole packer sealing technology, the new pressure grouting hole sealing technology, yellow clay borehole sealing technology and rubber ring (or capsule)-sealing fluid sealing technology are briefly analyzed, the advantages and disadvantages of the borehole sealing method and the sealing materials used in coal mines in China are summed up. The results can provides the reference for selection of borehole sealing methods and sealing materials of gas drainage in coal mines.
5

Li, Run Jun, Ren Liang Shan, Yi Xiong Gui, Jin Zhong Yang e Jian Liu. "Research on Key Technology of Shield Machine Main Drive Sealing". Applied Mechanics and Materials 580-583 (luglio 2014): 1081–87. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.1081.

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Abstract (sommario):
Due to poor bonding of a shield machine main drive leading to seal failure sealing fracture failure occurs, the proposed installation forms of adhesive sealing method is replaced by platen method, and seal material NBR replaced by a fluorine rubber, so that the combination of the housing seal is more reliable, avoiding the fracture caused by discontinuity of local sealing. Construction process increases the injection of three different oils enhancing the sealing effect. Through the application of practical project, no failure appears after sealing transformation.
6

Zhang, Fu Ying, Qing Qing Zhang e Ping Wang. "Efficiency- Reinforcement Technology Study for Hydraulic Reciprocating Sealing Based on TRIZ S-Field Analysis". Advanced Materials Research 97-101 (marzo 2010): 4433–36. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.4433.

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Abstract (sommario):
The dynamic seal mechanism of hydrodynamic reciprocating sealing is discussed. TRIZ S-Field model and standard solutions is proposed. The reliability and effectivity S-Field models of hydrodynamic reciprocating sealing are constructed according to typical hydrodynamic reciprocating sealing configuration shapes, such as O-ring sealing, Y-ring sealing and polymer sealing. The leakage and failure problems solutions of hydrodynamic reciprocating sealing as well as their configuration realization are studied based on TRIZ S-Field analysis and standard solutions, which offer powerful theoretic guides for efficiency-reinforcement technology of hydrodynamic reciprocating sealing.
7

Sun, Li Xia, Jian Bo Jia, Yan Xu e Sheng Yuan Jiang. "Sealing-Spinning Technology for Thin-Walled Aluminum Alloy Tubes". Advanced Materials Research 221 (marzo 2011): 259–63. http://dx.doi.org/10.4028/www.scientific.net/amr.221.259.

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Thin-walled aluminum alloy tubes can be used as rigid sampling tubes in aerospace and geological exploration and other scientific researches. In order to ensure the scientific value of samples and isolate the external environment, two sealing ends of the rigid sampling tubes are required. In this paper, the sealing-spinning process is adopted to form two sealing ends of the thin-walled aluminum alloy tubes. The results show that rigid sampling tubes with good sealing quality can be formed by controlling the main technical parameters of sealing-spinning process. And the relationships between spinning load and feed rate of roller, spinning load and shape of roller, reducing ratio of wall thickness and feed rate of roller are found.
8

Sun, Xiaoyan, Ke Li e Xin Wang. "Capsule-Bag-Type Sealing Technology for Gas Drainage Boreholes and Its Application". Geofluids 2022 (14 maggio 2022): 1–14. http://dx.doi.org/10.1155/2022/1671859.

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Abstract (sommario):
In gas control, the quality of drilling and sealing plays a key role in the final effect of gas drainage. This paper first studies the mechanism of hole leakage and the stability of the hole sealing section. At the same time, the bag-type grouting hole sealing device and safety pressure limiting valve were developed, and a new grouting hole sealing method for gas extraction was put forward, which could exert active strong support on the hole sealing section. The grouting cement with a high flow state, early strength, good injection ability, and good microexpansibility was prepared by compounding the fast hard sulfoaluminate cement and ordinary Portland cement and adding the appropriate amount of admixture to stimulate its activity. Engineering practice shows that compared with the polyurethane hole sealing method, 97% of the total holes with gas extraction concentration above 60% are extracted by the new grouting hole sealing method under the same conditions. 47% of the total holes were extracted with a gas concentration above 60% in the polyurethane hole sealing method. This shows that the new grouting hole sealing method can keep the stability of the hole sealing section of the borehole, can evade the leakage channel around the borehole, and is beneficial to gas extraction.
9

Gunawan, Sulistyo e Iwan Setyawan. "Progress in Glass-Ceramic Seal for Solid Oxide Fuel Cell Technology". Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 82, n. 1 (11 aprile 2021): 39–50. http://dx.doi.org/10.37934/arfmts.82.1.3950.

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Solid oxide fuel cells (SOFCs) have emerged as promising energy conversion devices nowadays. SOFC consists of several components such as cathode, anode, electrolyte, interconnects, and sealing materials. In planar SOFC stack construction, the sealant and interconnection functions play an important role. Glass and ceramics are quite popularly used as SOFC sealing materials to achieve several functions including preventing leakage of fuel and oxidants in the stack and electrically isolating cells in the stack. In this review, material preparation, material composition, ceramic properties especially thermal properties are compared from various systems that have been developed previously. The main challenges and complexities in the functional part of SOFC sealants include: (i) chemical incompatibility and instability in the oxidizing and reducing environment by adjusting the value of the thermal expansion coefficient (CTE) with the interconnecting material during SOFC operation, and (ii) insulation of oxidizing fuels and gases by matching CTE anode and cathode. Also, the sealant glass transition determines the maximum permissible working temperature of the SOFC. The choice of method and analysis will provide data on various ceramic attributes. The search for thermal attributes consisting of Glass transition (Tg), Deformation temp (Td), Crystallization temp (Tx), Melting pt (Tm) became a focus on SOFC sealant development.
10

Li, Shi Jie, Pan Pan Li, Xiao Ming Cao e Ming Wen. "Study on Sealing Technology for Micro-Arc Oxidation Ceramic Coatings of Aluminium". Advanced Materials Research 602-604 (dicembre 2012): 1591–95. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.1591.

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A new green sealing treatment, involving the use of bidirectional pulse power supply to the micro-arc oxidation ceramic coatings on Al substrate immersed in a solution of aluminum nitrate, has been developed. The best parameters of pulse sealing was obtained through single factor analysis and orthogonal experiment: frequency is 200Hz, the rations of positive and negative are both for 40%, sealing voltage is 80V, electrolyte concentration is 20g/L, sealing time is 30min. The polarization curve of sealing around the ceramic membrane in the mass fraction of 5% NaCl (PH=7) solution was tested. The results show that the ceramic membrane corrosion resistance after pulse sealing has been significantly improved.
11

Zhang, Wen Guang, Guo Min Lin, Miao Shang e Fei Zhou. "The Application of Modern Sealing Technology in Aircraft". Advanced Materials Research 912-914 (aprile 2014): 810–13. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.810.

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With the development of modern aircraft industry, the structure of the plane becoming more and more complex, and the sealing of parts is becoming stricter. Traditional sealing technology began gradually revealed its deficiencies. In this paper, the sealing method of the hydraulic system, oil tank, window and cover of the aircraft is introduced in details. The effective ways to seal have been put forward, and it also offering technical reference to the aircraft parts manufacturer.
12

Nishina, H. "Trends in Automotive Sealing Materials Technology". International Polymer Science and Technology 35, n. 3 (marzo 2008): 51–60. http://dx.doi.org/10.1177/0307174x0803500315.

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13

Ellis, Brian. "ESA sealing technology BAT guidance note". Sealing Technology 2005, n. 9 (settembre 2005): 9–11. http://dx.doi.org/10.1016/s1350-4789(05)70896-5.

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14

Tripathy, Bhawani, e Erika Szele. "LEM Sealing Technology for Fuel Cells". MTZ worldwide 72, n. 3 (11 febbraio 2011): 44–47. http://dx.doi.org/10.1365/s38313-011-0029-x.

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15

Sun, Zhongguang, Xuelong Li, Kequan Wang, Fakai Wang, Deyou Chen e Zhen Li. "Determination of Key Technical Parameters in the Study of New Pressure Sealing Technology for Coal Seam Gas Extraction". International Journal of Environmental Research and Public Health 19, n. 9 (19 aprile 2022): 4968. http://dx.doi.org/10.3390/ijerph19094968.

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Abstract (sommario):
Coal is affected by the concentrated stress disturbance of mining, the disturbance of drilling hole formation, and the concentrated stress of coal shrinkage and splitting of gas desorption from the hole wall; these result in a large number of secondary cracks that collect and leak gas. As a result, it is difficult for the coal seam sealing process to meet engineering quality sealing requirements, which results in problems such as low gas concentration during the extraction process. In this paper, based on the analysis of coal pore and fissure characteristics, and in view of the current situation of gas drainage and sealing in this coal seam, combined with the existing grouting and sealing technology, it is proposed to use pressure grouting and sealing to realize the sealing of deep coal bodies in the hole wall. According to the field conditions, the experimental pressure sealing parameter index is as follows: theoretical sealing length L1 = 9.69 m, the sealing length L2 = 13.98 m is verified, and the final sealing length is determined to be 15 m; the sealing radius is determined to be 0.6 m; the cement slurry was prepared on site with a water: cement ratio of 2:1; PG = 0.43 MPa was calculated; the range of the slurry diffusion radius R was 93.4–176.6 cm; the grouting pressure was determined to be 0.516 MPa. Field application practice has proved that: (1) Under the same drilling parameters and sealing parameters, the gas drainage effect of drilling with pressure sealing is 2.3 times higher than that without pressure sealing; (2) Using traditional sealing technology for drilling holes, the gas extraction concentration is far lower than the sealing operation effect of using the pressure sealing process; (3) Reasonably extending the length of the gas extraction drilling and sealing is a basic guarantee for realizing a substantial increase in the gas extraction concentration; (4) Sealing with pressure leads to a reliable and stable hole process.
16

Yan, Jing Peng, Gong Sheng Yang, Xiong Biao Wei, Juan Su, Qing Zhang e Zhe Lv. "Seal Optimization Technology Research of Large LNG Storage Tank Dome Gas Lift". Applied Mechanics and Materials 511-512 (febbraio 2014): 615–18. http://dx.doi.org/10.4028/www.scientific.net/amm.511-512.615.

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Dome gas lift is the technical difficulties of a large LNG (liquefied natural gas) tanks in the process of construction. The sealing structure is one of the core link in the process of the gas lift. In this paper, the seal structure of large LNG storage tank dome gas lift is studied. A new kind of sealing structure is designed by using gap seal. This paper has carried on the simulation analysis with ANSYS software to verify the feasibility of new type sealing structure. This kind of sealing structure can reduce the friction in the process of gas lift. It also can use the smaller contact area to achieve good sealing effect. The method has important practical value in enhancing the security of gas lift of LNG storage tank dome.
17

Ochonski, W. "High Technology of Sealing Solved by Ferrofluids". Industrial Lubrication and Tribology 45, n. 4 (aprile 1993): 7–11. http://dx.doi.org/10.1108/eb053429.

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18

Baumann, Matthias, Frank Bauer, Habil Werner Haas e Gert Baitinger. "How to measure lead in sealing technology?" Sealing Technology 2013, n. 7 (luglio 2013): 8–12. http://dx.doi.org/10.1016/s1350-4789(13)70261-7.

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19

"Sealing technology". Filtration & Separation 32, n. 4 (aprile 1995): 325. http://dx.doi.org/10.1016/0015-1882(95)90162-0.

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20

"Sealing Technology — Events Calendar". Sealing Technology 1996, n. 28 (aprile 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)80055-9.

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21

"Sealing technology — events calendar". Sealing Technology 1996, n. 25 (gennaio 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)80077-8.

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22

"Fluid sealing technology course". Sealing Technology 1996, n. 32 (agosto 1996): 4. http://dx.doi.org/10.1016/s1350-4789(96)80110-3.

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23

"Sealing Technology - Events Calendar". Sealing Technology 1996, n. 32 (agosto 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)80125-5.

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24

"Sealing Technology - Events Calendar". Sealing Technology 1996, n. 29 (maggio 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)80151-6.

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25

"Fluid sealing technology course". Sealing Technology 1996, n. 26 (febbraio 1996): 6–7. http://dx.doi.org/10.1016/s1350-4789(96)80164-4.

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26

"Sealing Technology - Events Calendar". Sealing Technology 1996, n. 26 (febbraio 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)80173-5.

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27

"Sealing technology — events calendar". Sealing Technology 1996, n. 27 (marzo 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)80195-4.

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28

"Sealing technology — Events calendar". Sealing Technology 1996, n. 34 (ottobre 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)90040-9.

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29

"Sealing technology — Events calendar". Sealing Technology 1996, n. 33 (settembre 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)90062-8.

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30

"Sealing technology — Events calendar". Sealing Technology 1996, n. 31 (luglio 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)90082-3.

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31

"Sealing technology — Events calendar". Sealing Technology 1996, n. 35 (novembre 1996): 16. http://dx.doi.org/10.1016/s1350-4789(96)90137-3.

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32

"Sealing technology — Events calendar". Sealing Technology 1997, n. 38 (febbraio 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)88365-1.

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33

"Sealing technology — events calendar". Sealing Technology 1997, n. 46 (ottobre 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90019-2.

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34

"Sealing technology — Events calendar". Sealing Technology 1997, n. 43 (luglio 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90022-2.

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35

"Sealing technology — Events calendar". Sealing Technology 1997, n. 41 (maggio 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90025-8.

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36

"Sealing technology — Events calendar". Sealing Technology 1997, n. 45 (settembre 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90040-4.

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37

"Sealing technology — Events calendar". Sealing Technology 1997, n. 39 (marzo 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90041-6.

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38

"Sealing technology — Events calendar". Sealing Technology 1997, n. 37 (gennaio 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90044-1.

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39

"Sealing technology — Events calendar". Sealing Technology 1997, n. 48 (dicembre 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90063-5.

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40

"Sealing Technology — Events calendar". Sealing Technology 1997, n. 44 (agosto 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90085-4.

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41

"Sealing technology — Events calendar". Sealing Technology 1997, n. 42 (giugno 1997): 16. http://dx.doi.org/10.1016/s1350-4789(97)90173-2.

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42

"Sealing technology — Events calendar". Sealing Technology 1998, n. 52 (aprile 1998): 16. http://dx.doi.org/10.1016/s1350-4789(98)90056-3.

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43

"Sealing technology — Events calendar". Sealing Technology 1998, n. 51 (marzo 1998): 16. http://dx.doi.org/10.1016/s1350-4789(98)90080-0.

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44

"Sealing technology — events calendar". Sealing Technology 1998, n. 49 (gennaio 1998): 16. http://dx.doi.org/10.1016/s1350-4789(98)90412-3.

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45

"Sealing Technology — Events calendar". Sealing Technology 1998, n. 50 (febbraio 1998): 16. http://dx.doi.org/10.1016/s1350-4789(98)90433-0.

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46

"Sealing Technology enhanced online". Sealing Technology 2007, n. 10 (ottobre 2007): 5. http://dx.doi.org/10.1016/s1350-4789(07)70445-2.

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47

"Sealing Technology goes online". Sealing Technology 2007, n. 12 (dicembre 2007): 3. http://dx.doi.org/10.1016/s1350-4789(07)70497-x.

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48

"Gear pump sealing technology". World Pumps 1996, n. 354 (marzo 1996): 17. http://dx.doi.org/10.1016/s0262-1762(99)80821-9.

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49

"Sealing technology — Events calendar". Sealing Technology 1994, n. 3 (marzo 1994): 16. http://dx.doi.org/10.1016/1350-4789(94)90028-0.

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50

"Sealing technology—events calendar". Sealing Technology 1994, n. 11 (novembre 1994): 16. http://dx.doi.org/10.1016/1350-4789(94)90057-4.

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